Robert Penn does a terrific job weaving together the history of bicycling, and specifically, the history of the bike components, with his own extensive biking experience and his own passion to supervise the building of a new bike. Anyone who has a passion for bicycling, even of the spinning variety, will enjoy, and be enlightened, by this book.
cold have been shorter only because the author makes the same point more than once. but they are good points. it is well established that regular exercise can improve mood. but this book trys to get into how this process happens. the author does seem to have a bias toward walking and running as the prefered forms of exercise for health. but just understanding how anything done for physical health affects mental health is a great place to start.